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Finding the Fourth Proportional to 143,999.60, 215,999.40 and 84,804.80

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Solution

The fourth proportional to 143,999.60, 215,999.40 and 84,804.80 is: 127,207.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,999.60 : 215,999.40 = 84,804.80 : x
  2. Step 2: Convert to fraction form
    143,999.60/215,999.40 = 84,804.80/x
  3. Step 3: Cross multiply
    143,999.60x = 215,999.40 × 84,804.80
  4. Step 4: Simplify right side
    143,999.60x = 18,317,785,917.12
  5. Step 5: Solve for x
    x = 18,317,785,917.12/143,999.60
  6. Step 6: Final answer
    x = 127,207.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.